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Study of wine tartaric salt stabilization by addition of carboxymethylcellulose (CMC). Comparison with the « protective colloïds » effect

Gerbaud, Vincent and Gabas, Nadine and Blouin, jacques and Crachereau, Jean-Christophe Study of wine tartaric salt stabilization by addition of carboxymethylcellulose (CMC). Comparison with the « protective colloïds » effect. (2010) Journal international des sciences de la vigne et du vin, vol. 44 (n° 3). pp. 135-150. ISSN 1151-0285

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Official URL: http://www.jisvv.com/sommaire_dernier_numero.php?id=418

Abstract

Aims : Inhibition of potassium hydrogen tartrate (KHT) crystallization by carboxymethylcellulose (CMC) is tested in a model solution and in wines. Tartaric acid salt crystallization risk is assessed by computing the supersaturation, saturation temperature and excess KHT with respect to the saturation equilibrium using MEXTAR® (Mesure de l’EXces de TARtre) software. Materials and results : Firstly, the time for crystals to appear was recorded by monitoring the conductivity in a model solution and in a wine, and the inhibition ratio was computed. At 11,5 °C, 0,5 mg.L-1 CMC inhibited KHT crystallization. The inhibitory effect increased exponentially with increasing CMC concentration and was several times greater than that of polysaccharides and polyphenols, the protective colloids in wine (Gerbaud et al., 1997). At 2 °C, 30 mg.L-1 CMC had the same inhibitory effect than 10 mg.L-1 at 11.5°C.Secondly, 20 red and white wines were refrigerated for 3 weeks at -4 °C with CMC or metatartaric acid. Results show that the addition of 20 mg.L-1 CMC has an inhibitory effect at least equivalent to 100 mg.L-1 metatartaric acid. Furthermore, for 10 wines preheated for 8 days at 30 °C and then refrigerated for 2 months at 0 °C, 5 and 20 mg. L-1 CMC maintains its inhibitory efficiency, unlike metatartaric acid which is hydrolysed Significance and impact of the study : The OIV-OENO 366-2009 and OIV-OENO 02/2008 resolutions recently authorized the use of CMC to prevent tartaric acid salt precipitation. With no impact on health, and stable under heating and in acid solution, CMC is an efficient candidate for tartaric stabilization. The optimal concentration of 20 mg.L-1 (2 g.hL-1) should however be adapted to local wine storage conditions and KHT crystallization risk.

Item Type:Article
Additional Information:Thanks to Vigne et Vin Publications Internationales Editor. The definitive version is available at http://www.jisvv.com
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Chambre d'Agriculture de la Gironde 33 - CA33 (FRANCE)
Other partners > Laboratoire et conseil oenologique Jacques Blouin (FRANCE)
Laboratory name:
Laboratoire de Génie Chimique - LGC (Toulouse, France) - Procédés Systèmes Industriels (PSI) - Analyse fonctionnelle des Procédés
Laboratoire de Génie Chimique - LGC (Toulouse, France) - Génie des Interfaces & Milieux Divisés (GIMD)
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Deposited By: Vincent GERBAUD
Deposited On:16 Mar 2011 16:09

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